Pass command line arguments onto platform apps which provide the right intent.

chrome/browser/extensions/platform_app_launcher.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/platform_app_launcher.h"
+
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/extensions/api/app/app_api.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/extension.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/base/mime_util.h"
+#include "net/base/net_util.h"
+#include "webkit/glue/web_intent_service_data.h"
+
+using content::BrowserThread;
+
+namespace {
+
+class PlatformAppLauncher
+    : public base::RefCountedThreadSafe<PlatformAppLauncher> {
+ public:
+  PlatformAppLauncher(const CommandLine* command_line, Profile* profile,
+                      const Extension* extension)
+      : command_line_(command_line),
+        profile_(profile),
+        extension_(extension) {}
+
+  void Launch() {
+    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+    if (!command_line_ || !command_line_->GetArgs().size()) {
+      LaunchWithNoLaunchData();
+      return;
+    }
+
+    FilePath file_path(command_line_->GetArgs()[0]);
+    BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, base::Bind(
+        &PlatformAppLauncher::GetMimeTypeAndLaunch, this, file_path));
+  }
+
+ private:
+  void LaunchWithNoLaunchData() {
+    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+    extensions::AppEventRouter::DispatchOnLaunchedEvent(profile_, extension_);
+  }
+
+  void GetMimeTypeAndLaunch(const FilePath& file_path) {
+    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+
+    std::string mime_type;
+    // If we cannot obtain the MIME type, launch with no launch data.
+    if (!net::GetMimeTypeFromFile(file_path, &mime_type)) {
+      LOG(WARNING) << "Could not obtain MIME type for " << file_path.value();
+      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
+          &PlatformAppLauncher::LaunchWithNoLaunchData, this));
+      return;
+    }
+
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
+        &PlatformAppLauncher::LaunchWithMimeTypeAndPath, this, file_path,
+        mime_type));
+  }
+
+  void LaunchWithMimeTypeAndPath(const FilePath& file_path,
+                                 const std::string& mime_type) {
+    // Find the intent service from the platform app for the file being opened.
+    const string16 kViewAction_UTF16 = ASCIIToUTF16("http://webintents.org/view");

[Mihai Parparita -not on Chrome, 2012/05/15 00:39:28]

There's no constant for this intent?

[benwells, 2012/05/16 01:35:29]

No. Its used somewhere else (in the downloads code somewhere) already. Maybe we
could move it somewhere central - Greg, any thoughts on where it would go?

+
+    webkit_glue::WebIntentServiceData service;
+    bool found_service = false;
+
+    std::vector<webkit_glue::WebIntentServiceData> services =
+        extension_->intents_services();
+    for (size_t i = 0; i < services.size(); i++) {
+      std::string service_type_ascii = UTF16ToASCII(services[i].type);
+      if (services[i].action == kViewAction_UTF16 &&
+          net::MatchesMimeType(service_type_ascii, mime_type)) {
+        service = services[i];
+        found_service = true;
+      }
+    }
+
+    // If this app doesn't have an intent that supports the file, launch with
+    // no launch data.
+    if (!found_service) {
+      LOG(WARNING) << "Extension does not provide a valid intent for "
+                   << file_path.value();
+      LaunchWithNoLaunchData();
+      return;
+    }
+
+    GURL file_url(net::FilePathToFileURL(file_path));
+    extensions::AppEventRouter::DispatchOnLaunchedEventWithUrl(
+        profile_, extension_, kViewAction_UTF16, mime_type, file_url);
+  }
+
+  const CommandLine* command_line_;
+  Profile* profile_;
+  const Extension* extension_;
+
+  DISALLOW_COPY_AND_ASSIGN(PlatformAppLauncher);
+};
+
+}  // namespace
+
+namespace extensions {
+
+void LaunchPlatformApp(const CommandLine* command_line,
+                       Profile* profile,
+                       const Extension* extension) {
+  // launcher will be freed when nothing has a reference to it. The message
+  // queue will retain a reference for any outstanding task, so when the
+  // launcher has finished it will be freed.
+  scoped_refptr<PlatformAppLauncher> launcher =
+      new PlatformAppLauncher(command_line, profile, extension);
+  launcher->Launch();
+}
+
+}  // namespace extensions